Abstract: The optical filter is one of the key components of the space optical remote sensor detector. The environmental stability of the film has a direct impact on the spectral response characteristics of the detector. Based on the existing environmental adaptability assessment standards concerning spacecrafts, electronic components and optical layers, we put forward a series of specified environmental assessment approaches for optical filters, including the assessment items and process, the experimental conditions, as well as the measurement & test items and methods. They are in line with the assessment conditions proposed by ESA and DALSA, and the test programs for the optical filter in the developing process of remote sensing camera. The assessment items include the thermal cycling test, the thermal vacuum test, the thermal storage test, the humidity test, and the gamma ray irradiation test. The measurement items include the spectral characteristics and the firmness of the film layer. The method are implemented in the remote sensing satellites, and verified by flight and ground tests, to serve as a guide for the environmental assessment for optical filters.